The following taps are not trusted: leoafarias/fvm Homebrew is currently ignoring formulae, casks and commands from these taps because tap trust is required. Trust specific formulae, casks or commands with: brew trust --formula <user>/<tap>/<formula> brew trust --cask <user>/<tap>/<cask> brew trust --command <user>/<tap>/<command> You can trust all formulae, casks and commands from these taps with: brew trust leoafarias/fvm Prefer trusting only the specific formulae, casks or commands you need. Untap them with: brew untap leoafarias/fvm To disable trust checks: export HOMEBREW_NO_REQUIRE_TAP_TRUST=1 This is not recommended and will be removed in a later release.